Thank you very much for your feedback.
1. I want to add a progression system that slowly increases the difficulty to make sure more players can enjoy the game. If that's not enough, I'll have to add something similar to your answer to this problem (difficulty slider).
2. I totally agree. Blood doesn't make much sense in the end game. I have some ideas on how to fix this, but they're not ready yet ;)
3. You don't even know how much these words mean to me. You are the first stranger who said something nice about my project. Thank you very much.
Have a great day/night :)